My idea is simple (hope i will explain it clearly because english isn't my first/secondary language)
A sort of timer.
Log on a server, play and start to loot objects, well. Now if you quit the server for another one, all the objects looted in the last 15~30 minutes will not beeing really acquired by the player. If the player disconnect he will loose all objects looted in the last minutes of his game.
Maybe it can work to counter this sh** players farming everywhere and disconnecting when scared.
My 2 cents'.